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Finding the Fourth Proportional to 18,820.52, 28,235.14 and 7,133.84

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Solution

The fourth proportional to 18,820.52, 28,235.14 and 7,133.84 is: 10,702.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.52 : 28,235.14 = 7,133.84 : x
  2. Step 2: Convert to fraction form
    18,820.52/28,235.14 = 7,133.84/x
  3. Step 3: Cross multiply
    18,820.52x = 28,235.14 × 7,133.84
  4. Step 4: Simplify right side
    18,820.52x = 201,424,971.14
  5. Step 5: Solve for x
    x = 201,424,971.14/18,820.52
  6. Step 6: Final answer
    x = 10,702.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.